From 5832b4fe9dd6717825d0e8d5768b7c78601a459c Mon Sep 17 00:00:00 2001
From: dichgrem <brcefy@gmail.com>
Date: Fri, 28 Nov 2025 16:59:17 +0800
Subject: [PATCH] update:demo4

---
 .gitignore                                  |  94 ++++++++++++++++++++
 com/study/demo/test3_1.class                | Bin 1101 -> 0 bytes
 com/study/demo/test3_2.class                | Bin 785 -> 0 bytes
 com/study/demo/test3_3.class                | Bin 821 -> 0 bytes
 com/study/demo/test3_4.class                | Bin 1144 -> 0 bytes
 com/study/demo/test3_5.class                | Bin 999 -> 0 bytes
 com/study/demo3/Bicycle.class               | Bin 426 -> 0 bytes
 com/study/demo3/Book.class                  | Bin 1462 -> 0 bytes
 com/study/demo3/Car.class                   | Bin 417 -> 0 bytes
 com/study/demo3/EBook.class                 | Bin 1013 -> 0 bytes
 com/study/demo3/Library.class               | Bin 1700 -> 0 bytes
 com/study/demo3/LibraryTest.class           | Bin 1862 -> 0 bytes
 com/study/demo3/Main2.class                 | Bin 733 -> 0 bytes
 com/study/demo3/PrintedBook.class           | Bin 1017 -> 0 bytes
 com/study/demo3/StudentManager.class        | Bin 1550 -> 0 bytes
 com/study/demo3/Train.class                 | Bin 423 -> 0 bytes
 com/study/demo3/Vehicle.class               | Bin 626 -> 0 bytes
 com/study/demo4/AlipayPayment.java          |   9 ++
 com/study/demo4/BikeDeliveryCalculator.java |  11 +++
 com/study/demo4/Cardeliverycalculator.java  |  12 +++
 com/study/demo4/CreditCardPayment.java      |   9 ++
 com/study/demo4/DeliveryFeeCalculator.java  |   5 ++
 com/study/demo4/HomeAppliance.java          |  26 ++++++
 com/study/demo4/HomeController.java         |  21 +++++
 com/study/demo4/PaymentFactory.java         |  16 ++++
 com/study/demo4/PaymentProcessor.java       |   6 ++
 com/study/demo4/SmartAirConditioner.java    |   7 ++
 com/study/demo4/SmartDevice.java            |   7 ++
 com/study/demo4/SmartLight.java             |   7 ++
 com/study/demo4/SmartMasher.java            |   7 ++
 com/study/demo4/TestControl.java            |  31 +++++++
 com/study/demo4/TestPay.java                |   8 ++
 com/study/demo4/TestTransport.java          |  22 +++++
 com/study/demo4/WechatPayment.java          |   9 ++
 34 files changed, 307 insertions(+)
 delete mode 100644 com/study/demo/test3_1.class
 delete mode 100644 com/study/demo/test3_2.class
 delete mode 100644 com/study/demo/test3_3.class
 delete mode 100644 com/study/demo/test3_4.class
 delete mode 100644 com/study/demo/test3_5.class
 delete mode 100644 com/study/demo3/Bicycle.class
 delete mode 100644 com/study/demo3/Book.class
 delete mode 100644 com/study/demo3/Car.class
 delete mode 100644 com/study/demo3/EBook.class
 delete mode 100644 com/study/demo3/Library.class
 delete mode 100644 com/study/demo3/LibraryTest.class
 delete mode 100644 com/study/demo3/Main2.class
 delete mode 100644 com/study/demo3/PrintedBook.class
 delete mode 100644 com/study/demo3/StudentManager.class
 delete mode 100644 com/study/demo3/Train.class
 delete mode 100644 com/study/demo3/Vehicle.class
 create mode 100644 com/study/demo4/AlipayPayment.java
 create mode 100644 com/study/demo4/BikeDeliveryCalculator.java
 create mode 100644 com/study/demo4/Cardeliverycalculator.java
 create mode 100644 com/study/demo4/CreditCardPayment.java
 create mode 100644 com/study/demo4/DeliveryFeeCalculator.java
 create mode 100644 com/study/demo4/HomeAppliance.java
 create mode 100644 com/study/demo4/HomeController.java
 create mode 100644 com/study/demo4/PaymentFactory.java
 create mode 100644 com/study/demo4/PaymentProcessor.java
 create mode 100644 com/study/demo4/SmartAirConditioner.java
 create mode 100644 com/study/demo4/SmartDevice.java
 create mode 100644 com/study/demo4/SmartLight.java
 create mode 100644 com/study/demo4/SmartMasher.java
 create mode 100644 com/study/demo4/TestControl.java
 create mode 100644 com/study/demo4/TestPay.java
 create mode 100644 com/study/demo4/TestTransport.java
 create mode 100644 com/study/demo4/WechatPayment.java

diff --git a/.gitignore b/.gitignore
index 8c9e901..775deb8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,95 @@
+### Compiled class files
+*.class
+
+### Log files
+*.log
+
+### BlueJ files
+*.ctxt
+
+### Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+### Package Files
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+### VM crash logs
+hs_err_pid*
+replay_pid*
+
+# ========================
+# Maven
+# ========================
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+
+# ========================
+# Gradle
+# ========================
+.gradle/
+build/
+!gradle-wrapper.jar
+!*/src/main/**/build/
+!*/src/test/**/build/
+
+### Avoid ignoring Gradle wrapper
+gradle-app.setting
+
+# ========================
+# IntelliJ IDEA
+# ========================
+.idea/
+*.iml
+*.ipr
+*.iws
+out/
+
+# ========================
+# Eclipse
+# ========================
+.project
+.classpath
+.cproject
+.settings/
+bin/
+tmp/
+
+# ========================
+# NetBeans
+# ========================
+nbproject/private/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+
+# ========================
+# VS Code
+# ========================
+.vscode/
+
+# ========================
+# OS files
+# ========================
+# macOS
+.DS_Store
+
+# Windows
+Thumbs.db
+
+#local
 com/study/test/
diff --git a/com/study/demo/test3_1.class b/com/study/demo/test3_1.class
deleted file mode 100644
index 8a09b0324f56277c50f6d35e78b7f55adb246df3..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/com/study/demo/test3_2.class b/com/study/demo/test3_2.class
deleted file mode 100644
index 5ba259a98cd14fe1697094d6f0ae05bb3403065a..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/com/study/demo/test3_3.class b/com/study/demo/test3_3.class
deleted file mode 100644
index 0f74550c92bbcc2672cb691175d5fb9d65ed6790..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/com/study/demo/test3_4.class b/com/study/demo/test3_4.class
deleted file mode 100644
index 04b1e71c03083b1386121824c045f1b18400d7d2..0000000000000000000000000000000000000000
GIT binary patch
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diff --git a/com/study/demo/test3_5.class b/com/study/demo/test3_5.class
deleted file mode 100644
index 596c796468b032e74f38b0cf44def7f27da325e0..0000000000000000000000000000000000000000
GIT binary patch
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diff --git a/com/study/demo3/Bicycle.class b/com/study/demo3/Bicycle.class
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GIT binary patch
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diff --git a/com/study/demo3/Book.class b/com/study/demo3/Book.class
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index 3c8d5f26b18c4153e2f7d478a17d1ee870cd457c..0000000000000000000000000000000000000000
GIT binary patch
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diff --git a/com/study/demo3/Car.class b/com/study/demo3/Car.class
deleted file mode 100644
index 7a34b2785118b0b21d2472f80f7b72a40fc4c5f7..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/com/study/demo3/EBook.class b/com/study/demo3/EBook.class
deleted file mode 100644
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GIT binary patch
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diff --git a/com/study/demo3/Library.class b/com/study/demo3/Library.class
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GIT binary patch
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GIT binary patch
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diff --git a/com/study/demo3/PrintedBook.class b/com/study/demo3/PrintedBook.class
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diff --git a/com/study/demo3/StudentManager.class b/com/study/demo3/StudentManager.class
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diff --git a/com/study/demo3/Train.class b/com/study/demo3/Train.class
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GIT binary patch
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diff --git a/com/study/demo3/Vehicle.class b/com/study/demo3/Vehicle.class
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GIT binary patch
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diff --git a/com/study/demo4/AlipayPayment.java b/com/study/demo4/AlipayPayment.java
new file mode 100644
index 0000000..b5193fd
--- /dev/null
+++ b/com/study/demo4/AlipayPayment.java
@@ -0,0 +1,9 @@
+package com.study.demo4;
+
+class AlipayPayment implements PaymentProcessor {
+  @Override
+  public boolean pay(double amount) {
+    System.out.println("支付宝支付: " + amount);
+    return true;
+  }
+}
diff --git a/com/study/demo4/BikeDeliveryCalculator.java b/com/study/demo4/BikeDeliveryCalculator.java
new file mode 100644
index 0000000..a77218a
--- /dev/null
+++ b/com/study/demo4/BikeDeliveryCalculator.java
@@ -0,0 +1,11 @@
+package com.study.demo4;
+
+class BikeDeliveryCalculator implements DeliveryFeeCalculator {
+  @Override
+  public double calculateFee(double distance) {
+    if (distance <= 5) {
+      return 5.0; // 起步价
+    }
+    return 5.0 + (distance - 5) * 1.5;
+  }
+}
diff --git a/com/study/demo4/Cardeliverycalculator.java b/com/study/demo4/Cardeliverycalculator.java
new file mode 100644
index 0000000..c677781
--- /dev/null
+++ b/com/study/demo4/Cardeliverycalculator.java
@@ -0,0 +1,12 @@
+package com.study.demo4;
+
+class CarDeliveryCalculator implements DeliveryFeeCalculator {
+  @Override
+  public double calculateFee(double distance) {
+    if (distance <= 5) {
+      return 10.0; // 起步价
+    }
+    return 10.0 + (distance - 5) * 2.0;
+  }
+}
+
diff --git a/com/study/demo4/CreditCardPayment.java b/com/study/demo4/CreditCardPayment.java
new file mode 100644
index 0000000..e0727d0
--- /dev/null
+++ b/com/study/demo4/CreditCardPayment.java
@@ -0,0 +1,9 @@
+package com.study.demo4;
+
+class CreditCardPayment implements PaymentProcessor {
+  @Override
+  public boolean pay(double amount) {
+    System.out.println("银行卡支付: " + amount);
+    return true;
+  }
+}
diff --git a/com/study/demo4/DeliveryFeeCalculator.java b/com/study/demo4/DeliveryFeeCalculator.java
new file mode 100644
index 0000000..3718cf4
--- /dev/null
+++ b/com/study/demo4/DeliveryFeeCalculator.java
@@ -0,0 +1,5 @@
+package com.study.demo4;
+
+interface DeliveryFeeCalculator {
+  double calculateFee(double distance);
+}
diff --git a/com/study/demo4/HomeAppliance.java b/com/study/demo4/HomeAppliance.java
new file mode 100644
index 0000000..b5ff203
--- /dev/null
+++ b/com/study/demo4/HomeAppliance.java
@@ -0,0 +1,26 @@
+package com.study.demo4;
+
+abstract class HomeAppliance implements SmartDevice {
+  protected String name;
+  protected boolean isOn;
+
+  public HomeAppliance(String name) {
+    this.name = name;
+    this.isOn = false;
+  }
+
+  @Override
+  public void turnOn() {
+    isOn = true;
+  }
+
+  @Override
+  public void turnOff() {
+    isOn = false;
+  }
+
+  @Override
+  public String getStatus() {
+    return name + " is " + (isOn ? "ON" : "OFF");
+  }
+}
diff --git a/com/study/demo4/HomeController.java b/com/study/demo4/HomeController.java
new file mode 100644
index 0000000..f6c89f7
--- /dev/null
+++ b/com/study/demo4/HomeController.java
@@ -0,0 +1,21 @@
+package com.study.demo4;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class HomeController {
+  private List<SmartDevice> devices = new ArrayList<>();
+
+  public void addDevice(SmartDevice device) {
+    devices.add(device);
+  }
+
+  public String getDeviceStatus(String name) {
+    for (SmartDevice device : devices) {
+      if (device.getStatus().contains(name)) {
+        return device.getStatus();
+      }
+    }
+    return "Device not found";
+  }
+}
diff --git a/com/study/demo4/PaymentFactory.java b/com/study/demo4/PaymentFactory.java
new file mode 100644
index 0000000..be757a8
--- /dev/null
+++ b/com/study/demo4/PaymentFactory.java
@@ -0,0 +1,16 @@
+package com.study.demo4;
+
+class PaymentFactory {
+  public static PaymentProcessor getProcessor(String type) {
+    switch (type.toLowerCase()) {
+      case "wechat":
+        return new WechatPayment();
+      case "alipay":
+        return new AlipayPayment();
+      case "card":
+        return new CreditCardPayment();
+      default:
+        throw new IllegalArgumentException("不支持的支付方式");
+    }
+  }
+}
diff --git a/com/study/demo4/PaymentProcessor.java b/com/study/demo4/PaymentProcessor.java
new file mode 100644
index 0000000..67bb08f
--- /dev/null
+++ b/com/study/demo4/PaymentProcessor.java
@@ -0,0 +1,6 @@
+package com.study.demo4;
+
+interface PaymentProcessor {
+  boolean pay(double amount);
+}
+
diff --git a/com/study/demo4/SmartAirConditioner.java b/com/study/demo4/SmartAirConditioner.java
new file mode 100644
index 0000000..450b968
--- /dev/null
+++ b/com/study/demo4/SmartAirConditioner.java
@@ -0,0 +1,7 @@
+package com.study.demo4;
+
+class SmartAirConditioner extends HomeAppliance {
+  public SmartAirConditioner(String name) {
+    super(name);
+  }
+}
diff --git a/com/study/demo4/SmartDevice.java b/com/study/demo4/SmartDevice.java
new file mode 100644
index 0000000..d13ce91
--- /dev/null
+++ b/com/study/demo4/SmartDevice.java
@@ -0,0 +1,7 @@
+package com.study.demo4;
+
+interface SmartDevice {
+  void turnOn();
+  void turnOff();
+  String getStatus();
+}
diff --git a/com/study/demo4/SmartLight.java b/com/study/demo4/SmartLight.java
new file mode 100644
index 0000000..05ed4c9
--- /dev/null
+++ b/com/study/demo4/SmartLight.java
@@ -0,0 +1,7 @@
+package com.study.demo4;
+
+class SmartLight extends HomeAppliance {
+  public SmartLight(String name) {
+    super(name);
+  }
+}
diff --git a/com/study/demo4/SmartMasher.java b/com/study/demo4/SmartMasher.java
new file mode 100644
index 0000000..313b8c1
--- /dev/null
+++ b/com/study/demo4/SmartMasher.java
@@ -0,0 +1,7 @@
+package com.study.demo4;
+
+class SmartMasher extends HomeAppliance {
+  public SmartMasher(String name) {
+    super(name);
+  }
+}
diff --git a/com/study/demo4/TestControl.java b/com/study/demo4/TestControl.java
new file mode 100644
index 0000000..032bc29
--- /dev/null
+++ b/com/study/demo4/TestControl.java
@@ -0,0 +1,31 @@
+package com.study.demo4;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TestControl {
+  public static void main(String[] args) {
+    HomeController controller = new HomeController();
+
+    // 创建设备
+    SmartLight light = new SmartLight("Living Room Light");
+    SmartAirConditioner ac = new SmartAirConditioner("Bedroom AC");
+    SmartMasher masher = new SmartMasher("Kitchen Masher");
+
+    // 添加到控制器
+    controller.addDevice(light);
+    controller.addDevice(ac);
+    controller.addDevice(masher);
+
+    // 测试设备状态
+    light.turnOff();
+    ac.turnOff();
+    masher.turnOn();
+
+    // 查询状态
+    System.out.println(controller.getDeviceStatus("Living Room Light"));
+    System.out.println(controller.getDeviceStatus("Bedroom AC"));
+    System.out.println(controller.getDeviceStatus("Kitchen Masher"));
+    System.out.println(controller.getDeviceStatus("Non-existent Device"));
+  }
+}
diff --git a/com/study/demo4/TestPay.java b/com/study/demo4/TestPay.java
new file mode 100644
index 0000000..b93a43d
--- /dev/null
+++ b/com/study/demo4/TestPay.java
@@ -0,0 +1,8 @@
+package com.study.demo4;
+
+public class TestPay {
+  public static void main(String[] args) {
+    PaymentProcessor processor = PaymentFactory.getProcessor("alipay");
+    processor.pay(666.0);
+  }
+}
diff --git a/com/study/demo4/TestTransport.java b/com/study/demo4/TestTransport.java
new file mode 100644
index 0000000..f57bd13
--- /dev/null
+++ b/com/study/demo4/TestTransport.java
@@ -0,0 +1,22 @@
+package com.study.demo4;
+
+public class TestTransport {
+  public static void main(String[] args) {
+    // 测试自行车配送
+    DeliveryFeeCalculator bike = new BikeDeliveryCalculator();
+    System.out.println("自行车配送 3km: ¥" + bike.calculateFee(3));
+    System.out.println("自行车配送 8km: ¥" + bike.calculateFee(8));
+
+    // 测试汽车配送
+    DeliveryFeeCalculator car = new CarDeliveryCalculator();
+    System.out.println("汽车配送 3km: ¥" + car.calculateFee(3));
+    System.out.println("汽车配送 8km: ¥" + car.calculateFee(8));
+
+    // 对比不同距离的费用
+    System.out.println("\n费用对比:");
+    for (int km = 1; km <= 10; km++) {
+      System.out.printf("%dkm: 自行车¥%.1f, 汽车¥%.1f%n",
+          km, bike.calculateFee(km), car.calculateFee(km));
+    }
+  }
+}
diff --git a/com/study/demo4/WechatPayment.java b/com/study/demo4/WechatPayment.java
new file mode 100644
index 0000000..cb63334
--- /dev/null
+++ b/com/study/demo4/WechatPayment.java
@@ -0,0 +1,9 @@
+package com.study.demo4;
+
+class WechatPayment implements PaymentProcessor {
+  @Override
+  public boolean pay(double amount) {
+    System.out.println("微信支付: " + amount);
+    return true;
+  }
+}